import java.io.*;
import java.net.*;

class A {
	A(int n) { i=n;	}
	public int i=100;
}

public class Ref {
	public static void main (String[] args) {
		A a=null;
		a = new A(99);
		A b = a;
		a.i=88;
		System.out.println(b.i);
	}
}
